Ventilator



Nov. 14, 1933. H w SE ER 1,935,215

VENTILATOR Filed Feb. 20, 1951 Fig. 1

Fig. 2 5

Harold. W Sievzrl: 4o

Patented Nov. 14, 1933 UNITED STATES VENTILATOR Harold W. Sievert, Albert Lea, Minn., assignor to Olson Manufacturing Company, Albert Lea, Mimi a corporation of Minnesota Application February 20, 1931 Serial No. 517,202

3 Claims.

My invention relates to ventilators and particularly to ventilators adapted to be installed in buildings such as barns and similar buildings used for housing animals.

An object of the invention resides in providing a ventilator which will remain operative at.

all times and which will not get readily out of order.

Another object of the invention resides in providing a ventilator having back draft valves and in constructing the vfntilator to prevent the valves from becoming stuck through frost and otherwise.

An object of the invention resides in constructing the ventilator with a case having an inlet and with means connected to said case and forming an outlet and in disposing within said case, a fan for causing the flow of air from said inlet to said outlet.

A still further object of the invention resides in providing within said case, a valve for preventing back draft through the ventilator, said valve being disposed between the inlet and said fan.

Another object of the invention resides in constructing the case rectangular in cross section with top, bottom and sides and in pivoting to the case, adjacent the sides thereof and in proximity to the'inlet..two closures adapted to close the inlet.

A feature of the invention resides in providing pintles for pivotally supporting said closures and in disposing said pintles in a slightly inclined position so as to cause the closures to automatically return to closing position upon the cessation of the flow of air from the inlet to the outlet.

Another object of the invention resides in disposing the axes of the pintles at right angles to the top and bottom of the case and in inclining the case in its entirety to cause the axes of the pintles to deviate slightly from the vertical.

Other objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/or described.

sectional view taken on line in the drawing and indicated in its entirety by the reference numeral 10. The invention may be used with any type of wall, though the wall shown has been illustrated as being of frame construction. This wall consists of studding 11 50 with interior sheathing 12 and exterior sheathing 13 attached thereto in the usual manner. The interior of the building in which the device is installed is designated by the numeral 14.

The ventilator proper consists of a case 15, 5 preferably rectangular in cross section, having a top 16, a bottom 17 and sides 18 and 19, the ends of said case being open. The opening at the inner end of the case, which is indicated at 20, serves as an inlet, while the other end of the case has connected to it,-an elbow 21 which extends through the wall 10 and is formed with a downwardly projecting opening 22 serving as an outlet for the ventilator.

The elbow 21 is somewhat smaller in lateral dimensions than the case 15 and is constructed and mounted as follows: This elbow comprises two sides 27 and 28 connected together through a curved top 29 having a horizontal portion 36, a curved portion 37, and. a vertical portion 30 32. The elbow further comprises an angular bottom 30 disposed between the sides 27 and 28 and bent over to vertical portion 31 parallel with the portion 32 at the lower end of the top 29 and a horizontal portion 130. The inner ends of the sides 27 and 28, which are designated at 38 and 39, the horizontal portion 36 of top 29' and the horizontal portion 130 of the bottom 30, form a rectangular neck which I have designated in its entirety at 35. A flange 33 is secured to the exterior of the elbow 21 by soldering, riveting or otherwise and lies in the plane of the portion 31 of bottom 30.

In installing the ventilator, a hole or opening 34 is first cut in the wall 10, of sufiicient dimensions to permit of the insertion of the neck 35 of elbow 21 through the same and into the interior of the building 14. The corners of the metal, forming the neck 35, are then slit up to the inner sheathing 12 and the protruding portions of the walls 30, 36, 38 and 39, bent back to form flanges 40, which lie along the sheathing 12 as indicated. These flanges may be nailed or otherwise secured to the sheathing in any suitable manner. When properly attached, the elbow 21 becomes rigidly and/firmly mounted in the building wall and in a manner to receive the case 15 of the ventilator proper.

The case 15 is attached to the building with the open end thereof opposite the inlet 20 in communication with the elbow 21. For so mounting the case the following construction ,is used: Upon the outer end of the walls 16, 1'7, 18 and 19 of case 15, are formed inwardly turned flanges These flanges have secured to them, an annular plate 24 which may be riveted or otherwise attached to the flanges 23 and which projects both inwardly and outwardly of the walls of the caseprop'er. The plate 24 is provided with a. hole 25 extending therethrough, which is preferably circular in formation and which is bounded by an angle iron frame 26, riveted to said plate or secured thereto in any other suitable-manner. The frame 26 is of such dimensions as to be received within the neck and the plate 24 extends outwardly beyond the case proper to overlie the flanges when the case is properly mounted. The case 15 may be attached to the wall 10 by nails, screws or otherwise, which pass through the protruding portion 41 of the plate 24 and when so mounted, forms a tight connection with the elbow 21.

For impelling the flow of air thrrmgh the ventilator, a fan 45 is employed, which may be of any desired type. This fan consists of a motor 46, to which a fan rotor 47 is attached in the usual manner. The motor 46 is mounted on a spider 48, which is constructed with a ring 49 encircling the angle frame 26 and attached to the same. The spider 48 is further constructed with a number of arms 50, which issue outwardly from the ring 49 and are secured to the motor proper in any suitable manner. The fan 47 is of a diameter such as to cause the fan to substantially fill the entire space within the frame 26, so that upon rotation of the rotor 47, air is drawn from the inlet 20, propelled through the case 15 and discharged from the outlet 22 of lbow 21. For cooling the motor 46, a vent pipe 51 is employed, which is connected to the case of said motor and which extends outwardly through the wall 10 to the exterior of the building, where cool air is available.

Within the interior of the case 15, is mounted two valves 52 and 53. These valves are provided with substantially vertical pivots, by means of which the same may be swung into opening position as shown in full lines in Fig. 2 or by means of which the same may be swung into closing position as indicated in dotted lines in Fig. 2. For

supporting the closures 52 and 53, an angle frame 54 is employed, having vertical frame members 58 and horizontal frame members 158, which frame completely encircles the interior of the case at the inlet 20 thereof. The closures 52 and 53 are constructed with hinges 55, which are attached to said closures and to the vertical members 58 of the angle frame 54. When the closures are in closing position as shown in dotted lines, the same lie against the inwardly extending flanges 5'7 of frame 54, so as to form a tight closure at the inlet of the case. As will be noted in Fig. 1, the case 15 is slightly tilted inwardly so that the axes of the pintles of hinges 55 incline slightly away from the vertical. For limiting the inward movement of the two closures 52 and 53, two stops 62 are'employed which may be attached to the case 15 in any suitable manner. Due to the closures being held from opening beyond the positions shown in full lines in Fig. 2, the closures will automatically swing back into normal closing position by gravity when released. It hence becomes evident that the closures 52 and 53, which form the reverse pressure valves will be opened as soon as sufiicient suction is produced within the case 15 through the fan 48, which causes the flow of air from the inlet 20 and through the case and out of the same through the outlet 22. As soon as the fan 48 stops, the closures 52 and 53 swing back by gravity to their closing position and prevent the reverse flow of air through the device.

If desired, the entire case 15 may be provided with an insulating lining 59, extending completely about the walls 16, 17, 18 and 19. Likewise, the closures 52-and 53 may be provided with insulatingslabs 60, attached thereto and upon the interior of the same so that the entire case 15 is thoroughly insulated. This prevents the accu mulation of moisture upon the exterior of the case, due to the cooling of the same from the outside air entering the case past the fan 48 when the same is not in use. Due to the fact that the closures 52 and 53, and the angle frames 54 are in the interior of the building, the parts thereof maintained relatively warm and frosting of the hinges 55 and other parts of the closures and closure frame is completely prevented.

The operation of my invention is manifest. In normal inoperative position, the closures 52 and 53 are in closing position as shown in dotted lines as shown in Fig. 2 and the fan 45 is stationary. As soon as the fan is started, a suction is created within the case 15, which opens the two closures 52 and 53, sucking air through the inlet 20 and discharging the samethrough the elbow 21 and the outlet 22 thereof. Due to the stops 62, the closures 52 and 53 can not fully open, and always remain slightly tilted toward closing position. As soon as the fan 45 is turned off, the current of air ceases to flow through the case 15, the closures 52 and 53 swinging on the hinges 55, swing back into closing position by gravity. When so disposed, the edges thereof abut against the flanges of the frame 54 and effect a tight closure for the case proper. This prevents back currents or drafts through the ventilator as previously brought out.

My invention is highly advantageous in that the same will not readily get out of order. ing of the closure hinges and other parts thereof is prevented so that the closures may readily function without hindrance. The device is entirely automatic and once the same has been installed, requires no care or attention excepting the oiling of the motor.

Changes in the specific form of my invention as herein disclosed may be made within the scope.

of what is claimed, without departing from the spirit of my invention.

Having described my invention, What I claim as new and desire to protect by Letters Patent is:

l. A ventilator for application to a building comprising a case having a top, bottom and sides and open at the ends, one of the open ends of said case being in communication with the interior of the building and forming an inlet, means connected with the other end of said case and forming an outlet therefor, a fan within said case adapted to discharge into said outlet, a pair of closures for closing said inlet and pintles for pivotally mounting said closures for swinging movement into said case upon travel of air from said inlet to said outlet, the axes of the pintles of said closures being inclined slightly from the vertical to cause the closures to automatically Till.)

Ltd

3. A ventilator for application to a building comprising a duct extending through the building and providing an outlet, a plate attached to said duct and disposed upon the interior of the building, said plate being secured to the wall of the building, a fan having a bracket secured to said plate, and a case forming an inlet for the ventilator, said case having a flange overlying said plate and attached thereto.

HAROLD W. SIEVERT. 

